package br.com.caelum.vraptor.scan;

import static org.hamcrest.Matchers.hasItem;
import static org.hamcrest.Matchers.hasSize;
import static org.junit.Assert.assertThat;
import static org.mockito.Mockito.when;

import java.net.URL;
import java.net.URLClassLoader;
import java.util.Arrays;
import java.util.Collection;

import org.junit.Before;
import org.junit.Test;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;

import br.com.caelum.vraptor.ioc.fixture.ResourceInTheClasspath;

public class ScannotationComponentScannerTest {

	private @Mock ClasspathResolver classPathResolver;
	
	@Before
	public void setup() throws Exception {
		MockitoAnnotations.initMocks(this);
	}

	@Test
	public void shouldScanWEBINFClasses() {
	when(classPathResolver.findBasePackages()).thenReturn(Arrays.asList(""));
	ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
	when(classPathResolver.getClassLoader()).thenReturn(classLoader);
		when(classPathResolver.findWebInfClassesLocation()).thenReturn(classLoader.getResource("br/com/caelum/vraptor/ioc/"));

	ScannotationComponentScanner scanner = new ScannotationComponentScanner();
	assertThat(scanner.scan(classPathResolver), hasItem(ResourceInTheClasspath.class.getName()));
	}
	
	@Test
	public void shouldScanBasePackages() {
		ClassLoader classLoader = new URLClassLoader(new URL[] {ScannotationComponentScannerTest.class.getResource("/test-fixture.jar")});
		when(classPathResolver.findBasePackages()).thenReturn(Arrays.asList("br.com.caelum.vraptor.ioc"));
		when(classPathResolver.getClassLoader()).thenReturn(classLoader);
		when(classPathResolver.findWebInfClassesLocation()).thenReturn(classLoader.getResource("br/com/caelum/vraptor/test/"));

		ScannotationComponentScanner scanner = new ScannotationComponentScanner();
		Collection<String> classes = scanner.scan(classPathResolver);
		assertThat(classes, hasItem(ResourceInTheClasspath.class.getName()));
	}
	
	@Test
	public void shouldReturnEmptyCollectionIfWebinfClassesNotFound() throws Exception {
		URL webinfLocation = new URL("file:/a/url/that/not-found");
		when(classPathResolver.findWebInfClassesLocation()).thenReturn(webinfLocation);
		
	ScannotationComponentScanner scanner = new ScannotationComponentScanner();
	assertThat(scanner.scan(classPathResolver), hasSize(0));
	}

	@Test(expected=ScannerException.class)
	public void shouldThrowScannerExceptionIfHasExceptionWhenProcessWebinfClasses() throws Exception {
		URL webinfLocation = new URL("file://x");
		when(classPathResolver.findWebInfClassesLocation()).thenReturn(webinfLocation);
		
	ScannotationComponentScanner scanner = new ScannotationComponentScanner();
	assertThat(scanner.scan(classPathResolver), hasSize(0));
	}
}